Principle. This product can be easily stuck under carpet. The floor-facing side features small suction pores. These pores use the vacuum cleaner bag's technology to draw in any pressure that is applied from the top, allowing air to escape and creating a low-pressure region within the cups. This creates an adhesive effect that holds your carpet in place. Benefits. The anti-curling rug gripper is less than 1/10 inch thick and less noticeable after installation. Suction technology firmly adheres to the floor without staining or damaging, and the gripper simply lifts off the floor. It is convenient to wash, as you don't have to separate it from your carpet for cleaning. The carpet tape adds extra comfort underfoot due to the slightly elastic nature of the suction technology. Components. This package contains 4 pieces. Each piece is square to increase the area in contact with the floor. This makes your kitchen, bathroom, and hallway much safer. You can also use them outdoors to prevent slipping and smooth corners. Shipping quantity: 4 pieces